105239605 has 16 divisors (see below), whose sum is σ = 139532544. Its totient is φ = 75792640.

The previous prime is 105239597. The next prime is 105239621. The reversal of 105239605 is 506932501.

It is not a de Polignac number, because 105239605 - 2³ = 105239597 is a prime.

It is a super-2 number, since 2×105239605² = 22150748921112050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24961 + ... + 28870.

It is an arithmetic number, because the mean of its divisors is an integer number (8720784).

Almost surely, 2^105239605 is an apocalyptic number.

It is an amenable number.

105239605 is a deficient number, since it is larger than the sum of its proper divisors (34292939).

105239605 is a wasteful number, since it uses less digits than its factorization.

105239605 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53876.

The product of its (nonzero) digits is 8100, while the sum is 31.

The square root of 105239605 is about 10258.6356305310. The cubic root of 105239605 is about 472.1279771833.

The spelling of 105239605 in words is "one hundred five million, two hundred thirty-nine thousand, six hundred five".